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Longitudinal Data
(Select from the criteria below to view unit data charts of NNAP results from 2014 to 2022, for any neonatal unit or network.)
Note that due to changes in measure definition and methodology, including the method used for case mix adjustment, not all years are directly comparable and year-on-year comparisons should be made with caution. More information can be found in the FAQs , and for full information about the NNAP methodology, please see the NNAP Methodology and Statistical Analysis Plan, available at: https://www.rcpch.ac.uk/nnap-data-flow-methodology. For some measures, masking is applied to unit level results to reduce the risk of deductive disclosure of sensitive information. In those cases, results are not visible in the charts.
The NNAP audit measures
For a full description of the NNAP audit measures please visit www.rcpch.ac.uk/nnap
Understanding the caterpillar plots
In a caterpillar plot, units are presented from left to right in the ascending order of their performance on the measure, with the most adherent shown on the right side of the graph. The performance on the measure (compliance) is shown by the vertical axis. Each unit is represented by a dot, with a vertical bar above and below the dot representing uncertainty (statistically the 95% confidence interval) in this measurement of performance.
Although units are ranked for presentation, the purpose of the plot is to demonstrate the variation rather than to describe differences between units with statistical confidence. Readers should therefore use these plots to assert differences between units with caution because the observed differences may have arisen by chance.
“Treatment effect” is the difference between the rate of BPD or death in babies cared for in a neonatal network compared to the observed rate for a matched group of babies with very similar case mix, cared for in all neonatal units. A positive treatment effect indicates that the rate of BPD or death is higher in the network of interest than for a comparable group of babies cared for in all neonatal units. Where the 95% confidence interval for this effect excludes 0, the treatment effect is unlikely to be a chance finding.
Treatment effect is not displayed for Special care Units because initial management of very preterm infants in Special care Units is, by definition, not planned and because Special care Units are unlikely to have sufficient numbers of very preterm infants attributed to them to make rates of BPD readily interpretable